Fatal error: Uncaught Error: Class "core\event\base" not found in C:\Apache24\htdocs\moodle\admin\tool\admin_presets\classes\event\preset_reverted.php:29 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\moodle\admin\tool\admin_presets\classes\event\preset_reverted.php on line 29